A graph of a penis with 9 upvotes. I hope this isn't where HN is going.
On it's own the original post was perhaps not too original, but it spurred some interesting discussion, like where the heart shape originated.
The penis graph on the other hand, only comes of as childish. Sure, it would have been really funny when I was 15. And to be sure, there are plenty of clever penis jokes out there ("The hammer is my penis" comes to mind), but this is not one of them.
1) via Wikipedia, the heart shape itself is likely based off the shape of the silphium seed, which was used as a contraceptive, or of course various naughty bits of anatomy. And condom sales spike around V-day. Relevancy #1: check.
2) It's an equation. And it even contains pi raised to the pith power. Relevancy #2: check.
edit: wow, crappy pi character. "pinus"